Category: Administration / Server

have to give a HUGHE praise to the Tor Project! just checked and they DO AN EXCELLENT job at keeping the user private the developers who constantly work to make the system better the thousands of volunteering admins that run […]

if the option firewall -> “delete” is greyed out first the firewall needs to be “dissassociated” with the resource (VPS VM)

methods for detecting network loops -> Realtek Remote Control Protocol – Loop Detect Packet – absolutley nothing wrong with it. (src) also interesting that HP switches are using a Cisco MAC address?

WARNING! MAKE BACKUP of current folder before proceeding! that being said, this search replace script works with the tool sed which required to escape all special characters. This tool will help with that: https://dwaves.de/tools/escape/ per default it will search the […]

“to swap, or not to swap, that is the question”: definately swap Shakespeare “to encrypt, or not to encrypt” (if it contains valuable data, encrypt) “to lvm, or not to lvm” (well….) because: one fine day, the user decides to […]

this might sound trivial, but there are multiple approaches: # for (theoretically every) Debian, but not every Debian based system: cat /etc/debian_version 11.3 # for Debian 10 and prior hostnamectl|grep Op Operating System: Debian GNU/Linux 10 (buster) # for Debian […]

lsb_release -a; # tested under Description: Debian GNU/Linux 10 (buster) su – root # create new file touch /scripts/shutdown.sh chmod +x /scripts/shutdown.sh # edit and insert orange content vim /scripts/shutdown.sh #!/bin/bash echo “=== shutdown as gracefully as possible ===” # […]

create a new shared folder on the nas call it “data” enable NFSv4, disable NFSv3 specify list of IPs that are allowed to access the NFSv4 share: don’t forget to hit “Apply” the idea is “anyway” to NAS<-directly-LAN-1000MBit->PC connect the […]

IDE, SCSI, SATA, SAS now U.2 M.2… that reminds of… USB Cable Salad of Madness – USB 3.0 and WiFi interference – Micro-USB USB-C mess has finally arrived the list of interfaces grows by the year? no U.2 is not: […]

will be redone soon

colorful text gives much more oversight. errors are easier to spot when they are marked in red colorful text is acchieved by defining color codes “switching” between color modes and back to default vim /scripts/colors.sh #!/bin/bash RED=’\033[0;31m’ WHITE=’\033[0;37m’ YELLOW=’\033[0;33m’ COLOR_OFF=’\033[0m’ […]

with virt-manager, it is a breeze to select the PCI device (in this case enp3s0 NIC) for pass through to guest vm, in case the vm shall get it’s very own dedicated nic: notice: the passed NIC dissapears from the […]

equals to: one neat function of the find command, it that what it found can be passed to another program for further processing. or: it can delete the file by adding the option -delete BUT (!!!) THIS IS DANGEROUS! as […]

privacy is worth swapping wifi cards! Open Source & Free Software are THE GOLD STANDARD which means: would ALWAYS prefer the hazzle of replacing a wifi mini card with an wifi mini card, that is supported by open source drivers, […]

inxi – Command line system information script for console and IRC DESCRIPTION It is also used a debugging tool for forum technical support to quickly ascertain users’ system configurations and hardware. inxi shows system hardware, CPU, drivers, Xorg, Desktop, Kernel, […]

and: is the EU / Germany location simply unattractive for many companies in view of the data protection craze? “In the end, it may be bitter for Quad9 that they only got into the trouble by moving to Europe, where […]

the positive vision (always start with something positive) if big data about every keystroke every step we make (the police: every step you make) algorithms determine how mankind will live and thus: technology is “neutral” until it is used for […]

it is actually like this, in virt-manager, that chipset and bios can only be changed during first setup “begin installation” it then is fixed and can not be changed in virt-manager

the most fundamental networking settings are ever changing it used to be /etc/resolv.conf where nameservers are set systemd is doing it’s own thing /etc/systemd/resolved.conf and Ubuntu (based on Debian) is doing (again) it’s entirely own thing (netplan) frankly: this sucks […]

nfs is to GNU-Linux what smb is to Windows: sharing dirs & files “The Network File System (NFS) was developed to allow machines to mount a disk partition on a remote machine as if it were a local disk. It […]

remember that discussion about ever changing non-standard ways of defining network interfaces and ip addresses under /etc/network… well guess what, canonical just came up with a completely new config file format X-D (guess, everything is a yaml.yml now) hostnamectl; # […]

raid10 combines the speed of raid0 with the resilience of raid1. watch out: shingled hdd are not good for RAID! setup of GNU Linux mdadm software RAID10 is actually pretty straight forward: no need to do any partitioning. # tested […]

first off the praise: kvm-qemu is a high performance nicely scriptable virtualization system if it works, it can do pretty things 🙂 especially like the x11 forwarded virt-manager gui over ssh (yes it is a bit slow… but simplicity at […]

update: Starlink reduced price to 80EUR! 😀 PLUS: THE HARDWARE IS FOR FREE! (the very good hardware alone is worth ~2000USD!) Thanks Elon! 😀 Support SpaceX: mankind’s only hope to ever reach Mars! order Starlink now! intro: would the user […]

a bit of a warning: this script is a bit of hardcore kvm “hacking” that might (sometimes) not work (kvm is under heavy development), wish to kvm and virsh-manager developers: please please integrate an easy way (like in virtualbox) for […]

update: 2021-08 from the TL-WA901ND menu: “Bridge with AP – In Bridge with AP mode, this device can be used to combine multiple local networks in distant hard-to-wire distant together to the same one via wireless connections. While bridging with […]

hostnamectl; # tested on Static hostname: lenovo Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-17-amd64 Architecture: x86-64 # with virsh –version 5.0.0 libvirtd –version libvirtd (libvirt) 5.0.0 /usr/bin/kvm –version QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-8+deb10u8) Copyright (c) 2003-2018 Fabrice […]

“thin provisioning” means “virtually” allocate more harddisk space, than the harddisk (physically) has, then grow the virtual harddisk file according to it’s needs (store more files = size of harddisk.img grows dynamically) # debian 10; # tested via bash terminal: […]

hostnamectl; # tested on Static hostname: giada Icon name: computer-desktop Chassis: desktop Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-17-amd64 Architecture: x86-64 su – root apt update # will install Java Web Start and openjdk-11-jre apt install icedtea-netx java-common […]

every user want’s a fast & responsive internet. BIND and DNS – the Phonebook of the internet – Berkeley Internet Name Domain – how to benchmark dns servers (find fastest) – LibreDNS There is nothing more anoying than slow loading […]